Rotating The Lcd Indicator; Grounding The Flowmeter Sensor; General Information On Ground Connections; Metal Pipe With Fixed Flanges - ABB ProcessMaster FEP611 Operating Instructions Manual

5.3.1

Rotating the LCD indicator

Depending on the installation position, the LCD display can be
rotated in 4 increments of 90° to enable horizontal readings.
Refer to chapter "Opening and closing the terminal box" on
page 18!
Rotating the LCD display: Perform steps
A
D
Fig. 24: Rotating the LCD display (example)
A G
... .
B
E
F
5.4

Grounding the flowmeter sensor

5.4.1

General information on ground connections

Observe the following items when grounding the device:
— For plastic pipes or pipes with insulating lining, the earth is
provided by the grounding ring or grounding electrodes.
— When stray potentials are present, install a grounding ring
upstream and downstream of the flowmeter sensor.
— For measurement-related reasons, the potentials in the
station ground and in the pipeline should be identical.
NOTE
If the flowmeter sensor is installed in plastic or earthenware
pipelines, or in pipelines with an insulating lining, transient
current may flow through the grounding electrode in special
C
cases.
In the long term, this may destroy the sensor, since the
grounding electrode will in turn degrade electrochemically. In
these special cases, the connection to the earth must be
performed using grounding rings. Install a grounding ring
upstream and downstream of the device in this case.
G
5.4.2

Metal pipe with fixed flanges

A
G12062
Fig. 25: Metal pipe, without liner (example)
A Flange design B Wafer-type design
1 Ground terminal
Use a copper wire (at least 2.5 mm² (14 AWG)) to establish the
ground connection between the sensor, the pipeline flanges
and an appropriate grounding point.
ProcessMaster FEP610, HygienicMaster FEH610 | OI/FEP610/FEH610-EN Rev. B 19
1
1
B
G12021